FEATURES .................................................................................................................................................... 3
• Operating Temperature: 32˚ to 122˚F (0˚ to 50˚C)
• Storage Temperature: -44˚ to 122˚F (-20˚ to 50˚C)
• Operating Humidity: <75% max.
• Operating Altitude: 6561 ft (2000m)
• Display: 6,000 count
• Backlight: Yes
• Over-range: “OL” is displayed
• Dimensions: 6.49” x 3.3” x 2.17”
• Item Weight: 15.0 oz
• Calibration: Recommended annually
• CAT Rating: CAT III 600V/CAT II 1000V
• Certifications: cELTus UL 61010-1:2012 3rd
CE EN 61010-1:2010 3rd, IEC61010-2-033:2012, Ed.1, EN 61326-1:2013
FCC, RoHS Compliant, TOV protection, IP 42, 6’ Drop protection
• Battery Type: (AA) 2
• Test Leads: CAT III test leads
• Accuracy: ± (% of reading + # of least significant digits)
• Audible continuity
• Capacitance 9999μF
• Milliamps/Microamps
• Test lead holders
• Kick stand
• High resolution backlit display
• Auto selection
• Fused test lead inputs
• Rubber boot
CATEGORY DEFINITIONS
Measurement CategoryShort-Circuit (typical) kA
II< 10
III< 50Mains distributions parts of the building
IV> 50Source of the mains installation in the building
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a
Location in the building installation
Circuits connected to mains socket outlets and similar
points in the MAINS installation
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Page 4
IMPORTANT SAFETY WARNINGS
WARNING
Read entire Safety Notes section regarding potential hazards and proper instructions before using this meter. In this
manual the word “WARNING” is used to indicate conditions or actions that may pose physical hazards to the user. The
word “CAUTION” is used to indicate conditions or actions that may damage this instrument.
WARNING
To ensure safe operation and service of the tester, follow these instructions. Failure to observe these warnings can
result in severe injury or death.
WARNING
• Before each use, verify meter operation by measuring a known voltage or current.
• Never use the meter on a circuit with voltages that exceed the category based rating of this meter.
• Do not use this meter during electrical storms or in wet weather.
• Do not use the meter or test leads if they appear damaged.
• Ensure meter leads are fully seated and keep fingers away from the metal probe contact when making
measurements. Always grip the leads behind the finger guards molded into the probe.
• Do not open the meter to replace batteries while the probes are connected.
• Use caution when working with voltages above 60 DC or 25 AC RMS. Such voltages pose shock hazards.
• To avoid false readings that can lead to electrical shock, replace batteries if a low battery indicator appears.
• Unless measuring voltage or current, shut off and lockout power before measuring resistance or capacitance.
• Always adhere to national and local safety codes. Use proper personal protective equipment (PPE) to prevent shock
and arc blast injury where hazardous live conductors are exposed.
• Always turn off power to a circuit or assembly under test before cutting, unsoldering or breaking the current path.
Even small amounts of current can be dangerous.
• Always disconnect the live test lead before disconnecting the common test lead from the circuit.
• In the event of electrical shock, ALWAYS bring the victim to the emergency room for evaluation, regardless of
victim’s apparent recovery. Electrical shock can cause unstable heart rhythms that may need medical attention.
• If any of the following occur during testing, turn off the power source to the circuit being tested: arching, flame,
smoke, extreme heat, smell of burning materials or discoloration or melting of components.
WARNING
Higher voltages and currents require greater awareness of physical safety hazards. Before connecting the test leads;
turn off power to the circuit under test, set meter to the desired function and range; connect the test leads to the meter
first, then connect to the circuit under test. Reapply power. If an erroneous reading is observed, disconnect power
immediately and recheck all settings and connections.
WARNING
This meter is designed for trade professionals who are familiar with the hazards of their trade. Observe all
recommended safety procedures that include proper lockout utilization and use of personal protective equipment that
includes safety glasses, gloves and flame resistant clothing.
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Page 5
OVERVIEW
DM505
A
Apo
V
B
C
D
E
F
G
A. Apo: Auto power off after 30 minutes of use. Press
and hold the HOLD button while turning the meter on
to disable Apo.
B. Digital Backlit Display
C. Range Button:
• Press to change from auto ranging to manual ranging.
• Press repeatedly to select proper range.
• Press and hold to return to auto range (AT will be
displayed on screen).
D. Min/Max Button:
• Press to enter MAX/MIN mode.
• In the V, μA, mA or Amps functions, either select AC/
DC or change to manual ranging before pressing this
button to enter MAX/MIN mode.
• Press repeatedly to alternate between Maximum and
Minimum readings.
• Press and hold to return to live readings
E. Select Button: Press to select AC,DC or Auto Selection
in the following functions: Voltage, μA, mA, Amps.
F. Function Dial: Turns on meter and is used to select
the function.
RANGE
SEL
A
FUSED
10A
MAX
MIN/MAX
mAμA
HOLD
FAST
μA
mA
A
MAX
CAT III
400mA
600V
MAX
CAT II
FUSED
1000V
H
I
G. Category Max Indicator: Maximum CAT Rating for
fused input jacks.
• Multifunction input port used for measuring: AC or DC
volts, resistance, continuity, diode, Amps, mA, μA.
• Use CATIII test leads or higher.
H. Hold/Fast Button:
• Press to hold the reading on the display. Press again
to return to live reading.
• Press to enter Fast MAX/MIN mode in MAX/MIN mode.
• Press again to return to normal MAX/MIN mode.
I. Back Light Button: Press to on back light. Press again
to turn off. Back light duration is 1 minute.
J. Recess for magnetic hanger
K. Test Lead Holders
L. Protective Rubber Boot
M. Battery Cover (under protective rubber boot)
N. Kick Stand
O. Serial Number (under kick stand)
J
K
L
M
N
O
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Page 6
SYMBOLS
Negative
Overload: Range Exceeded
Hold/Capture Value
Voltage
A
C/DC Voltage or Current Low Battery
Auto power off Active
Minimum measured
value displayed
A
AmpsDiode
Maximum measured
value displayed
Microfarad
μF
MicroampsmAmilliampsGround
nano FaradsOhms/ResistanceDangerous Levels
nF
ContinuityWarning or Caution
FuseAuto-ranging
Auto
Auto Selection
High Voltage Indication
AC/DC Voltage: <1000V AC/DC
DM505
Apo
Apo
AT
RANGE
SEL
A
DM505
V
V
MIN/MAX
HOLD
FAST
μA
mA
A
mAμA
MAXCAT III
400mA
600V
MAX
10A
MAX
FUSED
CAT II
FUSED
1000V
WARNING
• Use CATIII rated Test leads or higher.
• Do not attempt to measure more than 1000V AC/DC.
• Do not exceed 25 volts AC or 60 volts DC – RMS at either the
common or multifunction input ports as measured from
earth ground.
Features:
RANGE
MIN/MAX
HOLD
SEL
AC VOLTS
RangesAccuracyResolutionOverload Protection
600 mV to 1000V±(1.0% +3 dgts)0.1 mV to 1V1000V
Minimum sensitivity: 0.5V AC (auto selection mode), Frequency bandwidth: 400Hz
DC VOLTS
RangesAccuracyResolutionOverload Protection
600 mV to 1000V±(0.5% +3 dgts)0.1 mV to 1V1000V
Minimum sensitivity: 0.5V DC (auto selection mode)
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Page 7
Resistance: <40MΩ
A
μA
mA
A
μA
mA
DM505
Apo
Apo
AT
RANGE
SEL
A
DM505
V
MIN/MAX
HOLD
FAST
μA
mA
A
Features:
mAμA
MAXCAT III
400mA
600V
MAX
10A
MAX
FUSED
CAT II
FUSED
1000V
RANGE
WARNING
MIN/MAX
HOLD
• Do not measure resistance on a live circuit.
RangesAccuracyResolutionOverload Protection
600Ω to 6MΩ±(0.8% +5 dgts)0.1Ω to 0.001MΩ
40MΩ±(1.5% +5 dgts)0.01MΩ
600V
Continuity
DM505
Apo
Apo
DM505
V
RANGE
MIN/MAX
HOLD
SEL
A
FAST
μA
mA
A
Features:
mAμA
MAXCAT III
400mA
600V
MAX
10A
MAX
FUSED
CAT II
FUSED
1000V
• Buzzer sounds at less than 40Ω.
MIN/MAX
WARNING
HOLD
• Do not measure resistance on a live circuit.
Open Circuit VoltageAudible ThresholdOverload Protection
Approx.: <1.0VApprox.: 40Ω600V
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Page 8
Diode
A
μA
mA
A
μA
mA
GOOD DIODE
BAD DIODE
Open Diode
Displays "OL"
Both directions
Forward Bias
DM505
DM505
Apo
Apo
V
V
Displays
RANGE
MIN/MAX
approx.
voltage drop
HOLD
FAST
SEL
μA
mA
A
• Forward voltage drop if forward biased.
mAμA
A
MAXCAT III
400mA
600V
MAX
CAT II
10A
FUSED
1000V
MAX
FUSED
• “OL” if reverse biased.
Features:
Open Circuit VoltageOverload Protection
Approx.: <3.0V DC600V
Capacitance
DM505
DM505
Apo
Apo
AT
RANGE
MIN/MAX
SEL
Apo
or
V
Apo
'0' Both directions (shorted)
HOLD
HOLD
FAST
μA
V
nF
mA
A
MIN/MAX
V
mAμA
Features:
RANGE
MIN/MAX
A
HOLD
MAX
CAT III
400mA
600V
MAX
CAT II
10A
FUSED
1000V
MAX
FUSED
AC VOLTS
RangesAccuracyResolutionOverload Protection
10nF to 9999μF±(3.0% +5 dgts)0.01nF to 1μF600V
WARNING
To avoid damaging the meter or euipment under test, safely discharge Capacitors before measuring capacitance.
Large value capacitors should be discharged through an appropriate Resistance load. Use the DC Voltage function
to confirm the capacitor discharge.
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Page 9
AC/DC Microamps: 6000μAAC/DC Milliamps: 400mA
A
μA
mA
A
μA
mA
Features:
Apo
Apo
AT
RANGE
SEL
A
10A
MAX
FUSED
RANGE
MIN/MAX
mAμA
DM505
DM505
HOLD
FAST
μA
400mA
MAX
FUSED
MIN/MAX
Apo
V
μ A
mA
A
MAX
CAT III
600V
CAT II
1000V
HOLD
μA
SEL
Apo
AT
RANGE
A
SEL
DM505
DM505
m
V
A
MIN/MAX
HOLD
FAST
μA
mA
A
mAμA
MAX
CAT III
400mA
600V
MAX
10A
MAX
FUSED
CAT II
FUSED
1000V
mA
ACμA
RangesAccuracyResolutionOverload Protection
600μA to 6000μA±(1.2% +5 dgts)0.1μA to 1μA600mA /1000V Fast Fuse
Minimum sensitivity: 50μA AC (auto selection mode only)
DCμA
RangesAccuracyResolutionOverload Protection
600μA to 6000μA±(1.0% +3 dgts)0.1μA to 1μA600mA /1000V Fast Fuse
Minimum sensitivity: 50μA DC (auto selection mode only)
ACmA
RangesAccuracyResolutionOverload Protection
60mA to 400mA±(1.2% +5 dgts)0.01mA to 0.1mA600mA /1000V Fast Fuse
Minimum sensitivity: 5mA AC (auto selection mode only)
DCmA
RangesAccuracyResolutionOverload Protection
60mA to 400mA±(1.0% +3 dgts)0.01mA to 0.1mA600mA /1000V Fast Fuse
Minimum sensitivity: 5mA DC (auto selection mode only)
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Page 10
AC/DC Amps: <10A
A
μA
mA
DM505
DM505
Apo
Apo
AT
RANGE
SEL
MIN/MAX
V
A
HOLD
FAST
μA
mA
A
WARNING
mAμA
A
MAX
CAT III
400mA
600V
MAX
CAT II
10A
FUSED
1000V
MAX
FUSED
• Do not attempt to measure more than 10A AC.
A
Features:
RANGE
MIN/MAX
HOLD
SEL
AC AMPS
RangesAccuracyResolutionOverload Protection
6A to 10A±(1.5% +5 dgts)0.001A to 0.01A11A/1000V Fast fuse
Minimum sensitivity: 500mA AC (auto selection mode only)
CAUTION
: 20A overload for 30 seconds max.
DC AMPS
RangesAccuracyResolutionOverload Protection
6A to 10A±(1.2% +5 dgts)0.001A to 0.01A11A/1000V Fast fuse
Minimum sensitivity: 500mA DC (auto selection mode only)
CAUTION
: 20A overload for 30 seconds max.
Test Lead Notes
CATIII 1000V Measurement Locations
4mm
• Ensure the test lead shield is pressed firmly in place. Failure to use the CATIV shield increases arc-flash risk.
CATII 1000V Measurement Locations
18mm
• CAT IV shields may be removed for CAT II locations. This will allow testing on recessed conductors such as
standard wall outlets. Take care not to lose the shields.
WARNING: Test lead category protections apply only to test leads and should not be confused with the meter’s
specific CAT rating. Observe the maximum category protection indicated on the meter the test leads are plugged into.
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Page 11
Battery Replacement
• When the batteries are too low for safe operation, the Low Battery indicator will display.
AA
AA
S/N:
S/N:
FCC/IC INFORMATION
NOTE: This device complies with Part 15 of the FCC Rules and CAN ICES-3(A).
Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired operations.
INFORMATION TO THE USER
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the
FCC Rules. These limits are designedto provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will
not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to w hich the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
WARNING Any changes or modifications not expressly approved by the manufacturer, could void the user’s authority to
operate equipment.
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Page 12
WARRANTY
The DM505 is warranted to be free from defects in materials and workmanship for a period of 2 years from the date of
purchase. If within the warranty period your instrument should become inoperative from such defects, the unit will be
repaired or replaced at UEi’s option. This warranty covers normal use and does not cover damage which occurs in shipment
or failure which results from alteration, tampering, accident, misuse, abuse, neglect or improper maintenance. Batteries and
consequential damage resulting from failed batteries are not covered by warranty.
Any implied warranties, including but not limited to implied warranties of merchantability and
purpose, are limited to the express warranty. UEi shall not be liable for loss of use of the instrument or other incidental or
consequential damages, expenses, or economic loss, or for any claim or claims for such damage, expenses or economic loss.
A purchase receipt or other proof of original purchase date will be required before warranty repairs will be rendered.
Instruments out of warranty will be repaired (when repairable) for a service charge
This warranty gives you specific legal rights. You may also have other rights, which vary from state to state.
fitness for a particular
DISPOSAL
CAUTION:
correct disposal.
This symbol indicates that equipment and its accessories shall be subject to separate collection and
CLEANING
Periodically clean your meters’ case using a damp cloth. DO NOT use abrasive, flammable liquids, cleaning solvents, or strong
detergents as they may damage the finish, impair safety, or affect the reliability of the structural components.
STORAGE
Remove the batteries when instrument is not in use for a prolonged period of time. Do not expose to high temperatures or
humidity. After a period of storage in extreme conditions exceeding the limits mentioned in the General Specifications section,
allow the instrument to return to normal operating conditions before using it.